6 feet or 36 inches.
2 and 2/3 yards.
I just bought some fabric to cover a glider rocker and ottoman and i bought 2 1/2 yds of 56" wide fabric. You could get away with buying 2 1/4 yds of 54"-56" wide fabric.
36 inches is 1 yard and so 2 times 1 = 2 square yards
1-3/8 yard + 2-1/8 yard = 3-1/2 yards x $5.39 = $18.87 ----
18 ft * 18 ft * 2 inches = 6 yards * 6 yards * 2/36 yards = 2 cubic yards.
You can do this but the best thing is to cut a slit, dig a hole and put in your plant. After doing all the planting cover the visible fabric areas with mulch. I'm not a great fan of the fabric covers as a weed preventor because weeds (also Bermuda grass) will grow INTO the fabric making it difficult to remove. Best weed restrictor is 2 ins. of mulch.
36
72
Exactly 18 times
Exactly 18 times
36 times.